Engine-muffler.



R. BROWN.

ENGINE MUFFLER.

APPLICATION FILED MAYII. |918.

Patented Jan. T, 1919.

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gin/vanto@ QotIzT BQow/m UNITED sTATEs PATENT oEEIoE.

' ROBERT BROWN, or TOLEDO, omo.

ENGINE-MUFFLB.

To all whom t may concern: v l

Beit known that I, ROBERT BROWN, a citizen of the United States, residing at Toledo, in the county of Lucas, State of 'Ohio, have invented a new and useful Engine-Muilier;l

' and I do hereby declare'the following to be a full, clear, and exact description of the invention, such as |will enable others skilled in the art to which it appertainsto make and use the same.

The present invention relates -to a muiier for silencing the exhaust from internal combustion engines, and has for its object to provide a device of this character which is inexpensive in its construction and embodies novel features of design whereby it will act in a most effective manner to silence the exhaust without producing any undue back pressure upon the engine.

Further objects ofthe invention are to provide an engine muffler which can be inexpensively constructed from sheet material,

which has a compact formation and can'be mounted ,without diiiculty in the space provided under the body of a motor vehicle, which will not burst or get out of repair, and which can be easily assembled or taken apart.

With these and other objects in view, the invention consists in certain novel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof beingpointed out in the appended claims.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in

i which Figure 1 is a horizontal sectional View through a muflier constructed in accordance with the invention.

Fig. 2 is a transverse sectional view on the line 2-2 of Fig. 1, looking in the direction of the arrow.

Fig. 3 is a side elevation of the complete muffler.

Corresponding and like parts are referred to in the following description and indicated l in all the views of the drawings by the same reference characters.

Referring to the drawings, which illustrate one possible embodiment of the invention, the numerals 1 designate flanged top and bottomplates which are clamped against the upper and lower edges of the side walls 2 and coperate therewithto form the body Specification of Letters Patent. ,I

, Application filed May 15, 1918.A Serial No. 234,585.

Patented J an. 7., 1919.

of the muffler.- The muffler body has an elongated formation, one end A thereof being square, while the other eld B thereof is round. The side walls 2 are formed from a 'l continuous strip of sheet material which has a .width -corresponding to the thickness of the mufller body, theV said sheet material being bent intoy a shape corresponding to that of the body, and having the ends thereof overlapped and riveted at one of the corners of the body, as indicated at 3. The lperipheral flanges 1a of the plates 1 it around and 'embrace the upper and lower edges of the side .walls 2 and are clamped tightly in position by means of the bolts 4.

The inlet pipe 5 which conveys the exhaust gases directly from the engineto the muffler communicates with the interior of the body through the square end A thereof, the extremity, of the inlet pipe being preferably flanged at 5a so that it can be secured without diiiiculty to the side walls 2. The outlet opening 6 throu h which the exhaust gases leave the muliler ody is arranged at one side of the muiiier and at an intermediate point in the length thereof. A downwardly curved Y outlet pipe 7 is shown as applied to the exterior of the muilier casing and arranged to receive the gase'sfas they merge through the outlet opening 6. This curved outlet pipe 7 is illustrated as being flanged at 7a so that it can be readily riveted or otherwise attached to the mufller body, and it will be obvious that this curved pipe serves to direct the hot exhaust gases downwardly away from the body of the motor vehicle to which the muffler is applied.

A pair of spiral strips 8 and 9 extend inwardly from one side of the muler casing, being riveted or otherwise secured to the side walls 2 on opposite sides of the outlet opening` 6, as indicated at 10, and coperatingwith each other and with the curved end B of the mufller body to provide a tortuous path through which the exhaust gases'are caused to travel before they are nally discharged into the atmosphere. These spiral strips 8 and 9 have a width corresponding.

to thatof the side walls 2 so that the upper and lower edges thereof are engaged by the flanged top and bottom plates 1, and the free lends of the spiral strips terminate in sleeves 11 which receive a pair of the bolts 4. Those bolts passing through the sleeves 11 thus serve both to hold the inner ends of the ,and'with eachother to provide a tortuousv -path for conducting the products cornbustion to the outlet opening. v

spiral strips 8and 9- rigidly in proper relaj tionnto each other, and also to Aconnect the top and bottom plates 1 and retain the parts of the muer tightly together. The spiral strip 8 is longer than the strip 9 and the inner end portion thereof coperates with the curved end B of the muffler body to provide a curvedpassage D which receives the exhaust gases after they have initially been lpermitted to expand in the large chamber A .at the square end of the muiier body. From the passage D the exhaust gases enter the narrow passage E provided between the two spiral strips 8 and 9, said passage E serving to conduct the exhaust gases to the outlet pipe/7. After the. exhaust gases have passed i "through the Inutiler they are finally discharged downwardly throughthe outlet pipe 7, and. the -exhaust from the engine is thus silenced'without producing any undue back pressure thereon. n Having thus described the invention, what I claim-as new and desire-to secure by 'Letters Patent, is

1. An enginemuffler including an elonl -gated flatcasing having one end thereof curved and provided at its.opposite end with an inlet opening, an outlet opening being provided at one side of the casing, and spiral strips extending into the casing from opposite sides of the outlet opening and coperating with/the curved end of the casing :2. An engine muffler including an elongated iat casing having one end thereof curved and the other end thereof provided with an inlet opening, an outlet opening being provided in one side of the casing, spiral strips extending into the casing from opposite sides of the outlet opening and-coper-v ating with the curved end of the casing and with each other to provide a tortuous path` for theproducts ofv combustion, the inner ends ofthe spiral strips terminating in sleeves, and fastening members extending through the casing andA engaging the sleeves to hold the spiralv strips in proper position. 3. An engine muier including an elon-` gated flat casing having removable top and bottom` plates and having an inlet opening in one end thereof, the opposite end of the casing being rounded and an outlet opening being provided at an intermediate point in one side of the casing, a pair of spiral strips extending into-y the casing from opposite with' each other and with the rounded end of the'casing to provide a tortuous path for the products of coi'n'bu'stion, and clamping sides ofthe outlet opening and coperating 'i bolts connecting the top and bottom plates the casing, an outlet opening being provided.

at one side of the casing, spiral strips ex l tending into the casing and having the outer ends thereof secured to the side walls on opposite sides of the outlet opening, the strips having a lwidth corresponding to the width of the side walls and coperating. with each other andthe curved ends' of the casing to provide a tortuous path for the products of combustion, clamping bolts connecting the removable top and bottom plates andengaging the inner ends of the spiral strips to hold them* in proper relation, and a curved outlet pipe applied to the casing and communicating withy the outlet opening. i

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. p y

ROBERT BROWN.

Witnesses:

J S. MCCARRIGK, lR. BRANDENBERGER. 

